OK thanks both of you. I didn't realise there was a distinction between system
python and other (user/personal) python. Yes, python2.7.3 is still there in
/usr/bin/python .
/usr/bin/python appears to be getting numpy and scipy from
/usr/lib/python2.7/dist-packages . So I added that to PYTHONPATH and reran
python (i.e. /usr/local/bin/python, which is 2.7.12).
But now when I "import numpy" I get an error message which ends in:
File "/usr/lib/python2.7/dist-packages/numpy/core/__init__.py", line 5, in
<module>
import multiarray
ImportError: /usr/lib/python2.7/dist-packages/numpy/core/multiarray.so:
undefined symbol: PyUnicodeUCS4_AsUnicodeEscapeString
So for now I give up.
But the good news is that I have learned that my "old" python (2.7.3) is still
on my machine. So for now I am renaming /usr/local/bin/python to
/usr/local/bin/python2.7.12 , and going back to using python 2.7.3.
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